Cross-cultural evidence links pair bonding and testosterone (T). We investigated what
factors account for this link, how casual relationships are implicated, and whether …

Following the birth of an infant, decreases in testosterone and increases in depressive
symptoms have been observed in fathers. Paternal testosterone may reflect fathers' …

Background and objectives In many settings, partnered, invested fathers have lower
testosterone than single men or fathers who are not involved in caregiving. Reduced …

During the postpartum period, the paternal brain suffers extensive and complex
neurobiological alterations, through the experience of father–infant interactions. Although …

Father absence in early life has been shown to be associated with accelerated reproductive
development in girls. Evolutionary social scientists have proposed several adaptive …

This study examined whether fathers' parental involvement level and their accessibility have
any effects on the age at which their daughters experience menarche in a non-western …

Because cross-species evidence suggests that high testosterone (T) may interfere with
paternal investment, the relationships between men's transition to parenting and changes in …

Evolutionary theory suggests that a man's testosterone (T) decreases after his fathering of
children, when his priority shifts from mating to cooperative parenting (Fatherhood: Evolution …

The present study examined testosterone (T) and cortisol (Cort) in fathers engaged with
caregiving. We collected saliva samples in the mornings and evenings of two consecutive …

How hormones and neuromodulators initiate and maintain paternal care is important for
understanding the evolution of paternal care and the plasticity of the social brain. The focus …